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CONTRIB: debug: also support reading values from stdin

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This is convenient when processing large dumps, it allows to copy-paste
values to inspect from one window to another, or to directly transfer
a "show fd"/"show stream" output through sed. In order to do this, simply
pass "-" alone instead of the value and they will all be read one line at
a time from stdin. For example, in order to quickly print the different
set of connection flags from "show fd", this is sufficient:

     sed -ne 's/^.* cflg=\([^ ]*\).*/\1/p' | contrib/debug/flags conn -
This commit is contained in:
Willy Tarreau 2020-02-06 18:17:50 +01:00
parent 0cf811a5f9
commit e4f80a076c
1 changed files with 32 additions and 7 deletions
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39
contrib/debug/flags.c
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@ -395,7 +395,7 @@ void show_strm_flags(unsigned int f)
void usage_exit(const char *name)
{
fprintf(stderr, "Usage: %s [ana|chn|conn|cs|si|sierr|strm|task|txn]* [0x]value*\n", name);
fprintf(stderr, "Usage: %s [ana|chn|conn|cs|si|sierr|strm|task|txn]* { [+-][0x]value* | - }\n", name);
exit(1);
}
@ -405,7 +405,10 @@ int main(int argc, char **argv)
unsigned int show_as = 0;
unsigned int f;
const char *name = argv[0];
char line[20];
char *value;
int multi = 0;
int use_stdin = 0;
char *err;
while (argc > 0) {
@ -425,14 +428,38 @@ int main(int argc, char **argv)
if (argc > 1)
multi = 1;
if (strcmp(argv[0], "-") == 0)
use_stdin = 1;
while (argc > 0) {
flags = strtoul(argv[0], &err, 0);
if (!*argv[0] || *err) {
fprintf(stderr, "Unparsable value: <%s>\n", argv[0]);
if (use_stdin) {
value = fgets(line, sizeof(line), stdin);
if (!value)
break;
/* skip common leading delimitors that slip from copy-paste */
while (*value == ' ' || *value == '\t' || *value == ':' || *value == '=')
value++;
/* stop at the end of the number and trim any C suffix like "UL" */
err = value;
while (*err == '-' || *err == '+' ||
(isalnum(*err) && toupper(*err) != 'U' && toupper(*err) != 'L'))
err++;
if (err)
*err = 0;
} else {
value = argv[0];
argv++; argc--;
}
flags = strtoul(value, &err, 0);
if (!*value || *err) {
fprintf(stderr, "Unparsable value: <%s>\n", value);
usage_exit(name);
}
if (multi)
if (multi || use_stdin)
printf("### 0x%08x:\n", flags);
if (show_as & SHOW_AS_ANA) show_chn_ana(flags);
@ -444,8 +471,6 @@ int main(int argc, char **argv)
if (show_as & SHOW_AS_STRM) show_strm_flags(flags);
if (show_as & SHOW_AS_TASK) show_task_state(flags);
if (show_as & SHOW_AS_TXN) show_txn_flags(flags);
argv++; argc--;
}
return 0;
}